list=["my","name",18,"is",18,"mark","age",18]
print("删除前：",list)


del list[1]
print("del后：",list)


list=["my","name",18,"is",18,"mark","age",18]
list.pop()
print("pop后：",list)

list=["my","name",18,"is",18,"mark","age",18]
list.pop(0)
print("pop(0)后：",list)

list=["my","name",18,"is",18,"mark","age",18]
list.remove(18)
print("remove后：",list)

